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题目
题型:同步题难度:来源:
He was so tired that he couldn"t work any longer.[     ]
A. wasn"t allowed to    
B. shouldn"t
C. wasn"t able to          
D. mustn"t
答案
C
核心考点
试题【He was so tired that he couldn"t work any longer.[     ]A. wasn"t allowed to    】;主要考察你对词法等知识点的理解。[详细]
举一反三
I _____ have two wings and then fly to the moon.[     ]
A. would
B. could          
C. should        
D. might
题型:同步题难度:| 查看答案
Cars and buses________ stop when the traffic lights turn red.[     ]
A. can      
B. need      
C. may     
D. must
题型:同步题难度:| 查看答案
—It is nearly six p.m. Will you have dinner here?
—Sorry, _______. I have many things to do.[     ]
A. I mustn"t
B. I can"t
C. I needn"t
D. I don"t
题型:同步题难度:| 查看答案
—Must I finish the work before" clock?
—No, you _______.[     ]
A. needn"t  
B. mustn"t    
C. have to
D. can t
题型:同步题难度:| 查看答案
Henry___________ be at home because he phoned me from the farm just now.[     ]
A. mustn"t  
B. isn"t able to  
C. may not  
D. can"t
题型:同步题难度:| 查看答案
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